Combined slub catcher and self threader for spinning and twisting machines



Aug. 24, 1937. G. c. MQOGREGOR 2,091,209

COMBINED SLUB CATCHER AND SELF THREADER FOR SPINNING AND TWISTINGMACHINES Filed March 9, 1937 George 6'. Mac G/eyar,

IGJ YW elk IMAM;

Patented Aug. 24, 1937 PATENT OFFICE COMBINED SLUB CATCHER AND SELFTHREADER. FOR SPINNING AND TWIST- ING MACHINES George C. MacGregor,Cumberland, R. I.

Application March 9,

8 Claims.

The invention relates to a device preferably to be attached to the usualthread board of a spinning machine and to take the place of the usualsimple thread guide nowin use.

The roving which is fed to the spinning machine includes irregularitiesfrequently referred to as slubs. In the ordinary machine the slubsremain in the roving after it is spun and produce irregularities,unevenness and other undesirable effects in the final .yarn or threadproduced. To some extent they may be removed from the thread or yarn buttheir removal may be a separate process andis expensive and not alwayssure.

The present invention contemplates providing at the thread board notmerely a thread guide which is usually employed but substitutingtherefore a device which acts as a guide for the thread and at the sametime acts as a slub catcher and removes the slubs from the rove as apart of the spinning or twisting operation.

In the accompanying drawing Figure 1 is a diagramatic view of thespinning apparatus illustrating one embodiment of the invention inplace.

Fig. 2 is a plan view of a combined slub catcher and thread guide. Fig.3 is a side elevation of the same. Fig. 4 is a transverse section on theline 4- 3 of Fig. 3.

As illustrated in Fig. 1 the roving it comes from the usual spool orbobbin l l and passes between the usual rollers l2. It then passesthrough the combined club catcher and thread guide generally indicatedat l3 as mounted in any suitable way on the thread board 54. The spun ortwisted thread is wound on the bobbin i5 ready for further use. Thecombined slub catcher and thread guide in the specific form illustratedconsists of a preferably round end it by which it may be fastened to thethread board itin place of the usual simple thread guide heretoforeemployed. For convenience of operation and manipulation the forwardportion of the shaft may be squared as indicated at ii and it graduallyexpands into an L-shaped member having a longer arm l8 and a shorter arml9. Between the shaft portion l1 and the arm 18 is a seat 23 in which isa perforation through which passes a bolt 2| fastened by a nut 22 whichholds on to the seat 23 a second L-shaped member having a short arm 2and a longer arm 25. In the arm 24 is a slot 29 allowing adjustment onthe bolt 2|. The longer arm 25 lies parallel with the longer arm 18 ofthe first L-shaped member and the end of the longer arm 25 lies parallelwith and close to the shorter arm 55 IQ of the main L-shaped member.There is thus 1937, Serial No. 129,947

provided an L-shaped slot having a long arm slot 26 and a short arm slot2'! between the two L- shaped members. Adjustment of the arm 2:4 bymeans of the bolt 25 and the slot it may vary the widths of the slots 26and 2i. Carried by the movable long arm 25 is a thread guide which isillustrated as made of a bar or wire threaded at its end 2'8 and screwedat 28 into the arm 25. It is bent or twisted to form a single coil 29from which extends an inclined arm 30 leaving an opening 3| in the coil.The end of the arm. 35 is preferably flared as indicated at 32.

The roving enters the slot 26 and passes through the coil 29 adjacentthe thread guide 30 and passes to the bobbin i5. As the roving passes 15through the slot 26 it may weave back and forth to some extent in thatslot and as the twist is applied to the yarn it turns any slub presentso that it is not flat when it passes through the slub catcher but maybe there caught and removed. The thread guide to some extent limits themovement of the roving in the slot 26. The slot 26 may be adjusted toreceive and operate yarn or thread of any desired size. The coil 29 ofthe thread guide lies under the slot 26 and since the 25 thread guidemoves with the arm 25 when it is adjusted the thread guide wil always bein proper position with respect to the slot 2% to receive the thread.The end 32 of the arm 3% is flared or spread so that the tendency of thethread when 30 it breaks will be to Wrap itself around the arm 30instead of flying free. A broken thread is thus prevented frominterfering with the activities of the adjacent spinning structures. Thethread guide preferably will be in position as indicated 35 in Fig. 3when the opening 3| in the thread guide liesvery close to the slot 27 sothat when the device is initially threaded, or if a thread breaks, itmay be conveniently inserted into the device as a unit because a singlemovement may cause it 40 to pass through the slot 3! into the coil 29and at the same time through the slot 21 from which it may be broughtaround to the slot 26 to be in position for proper operation.

It will be seen that there is thus produced a 5 simple, relatively cheapdevice which may be readily, simply and conveniently installed on threadboards already in use.

The device tends to produce perfect thread; it prevents interferencewith adjacent spinning devices. The thread may be readily, easily andsimply inserted into its proper position in the combined devices.

The device is reversible and may be used for either Z-twist or S-twistspinning.

The invention is not confined to the specific apparatus illustratedwhich comprises merely one embodiment of the invention which obviouslymay be embodied in other forms of apparatus.

I claim as my invention:

1. In a cleaner, two L-shaped members arranged to leave an L-shaped slotbetween them, means for adjusting the width of the slot, and a threadguide carried by one of the L-shaped members.

2. A thread guide comprising a wire having a single coil therein throughwhich the thread passes, and an arm extending adjacent the path of thethread and having a flared end to cause a broken end to adhere to thethread guide.

3. A combined cleaner and thread guide comprising a stationary L-shapedmember, a square shaft for the member, a round extension on the shaft, ascrew in the shaft, a second L-shaped member provided with a slotthrough which the screw passes for holding the second L-shaped member inadjusted position on the shaft so that the second L-shaped membercooperates with the first L-shaped member to form an L-shaped slot ofadjustable width through which the roving passes to be cleaned, a threadguide removably mounted in the second L-shaped member, the thread guidecomprising a twisted wire of a single coil the entrance to which issubstantially in line with the entrance to the L-shaped slot and thecenter of which is substantially in line with the inner arm of theL-shaped slot and a downwardly extending arm at an angle having a flaredend.

4. A combined cleaner and thread guide comprising a stationary L-shapedmember, a screw in the stationary member, a second L-shaped memberprovided with a slot through which the screw passes for holding thesecond L-shaped member in adjusted position so that the second L-shapedmember cooperates with the first L- shape member to form an L-shapedslot of adjustable Width through which the roving passes to be cleaned,a thread guide removably mounted in the second L-shaped member, thethread guide comprising a twisted wire of a single coil the entrance towhich is substantially in line with the entrance to the L-shaped slotand the center of which is substantially in line with the inner arm ofthe L-shaped slot and a downwardly 50 extending arm at an angle having aflared end.

5. A combined cleaner and thread guide comprising a stationary L-shapedmember, a screw in the stationary member, a second L-shaped memberprovided with a slot through which the screw passes for holding thesecond L-shaped member in adjusted position so that the second L-shapedmember cooperates with the first L- shaped member to form an L-shapedslot of adjustable width through which the roving passes to be cleaned,and a thread guide removably mounted in the second L-shaped member.

6. A combined cleaner and thread guide comprising a stationary L-shapedmember, a second L-shaped member, means for holding the second L-shapedmember in adjusted position so that the second L-shaped membercooperates with the first L-shaped member to form an L-shaped slot ofadjustable width through which the roving passes to be cleaned, and athread guide removably mounted in the second L-shaped member.

7. A combined cleaner and thread guide comprising a stationary L-shapedmember, a second L-shaped member, means for holding the second L-shapedmember in adjusted position so that the second L-shaped membercooperates with the first L-shaped member to form an L-shaped slot ofadjustable width through which the roving passes to be cleaned, a threadguide removably mounted in the second L-shaped member, the thread guidecomprising a twisted wire of a single coil the entrance to which issubstantially in line with the entrance to the L-shaped slot and thecenter of which is substantially in line with the inner arm of theL-shaped slot, and a downwardly extending arm at an angle having aflared end.

8. A combined cleaner and thread guide comprising a stationary L-shapedmember, a second L-shaped member, means for holding the second L-shapedmember in adjusted position so that the second L-shaped membercooperates with the first L-shaped member to form an L-shaped slot ofadjustable width through which the roving passes to be cleaned, a threadguide removably mounted in the second L-shaped member, the thread guidecomprising a twisted wire of a single coil the entrance to which issubstantially in line with the entrance to the L-shaped slot.

GEORGE C. MACGREGOR.

